Manifold Technology allows the combining of the outputs of multiple drivers into a single horn or low-frequency enclosure without destructive interference. Enclosures built using these criteria have deeper bass response and lower distortion than horn designs and higher sensitivity than sealed systems.ġ974 Electro-Voice develops constant-directivity (CD) horns, which allow a loudspeaker to maintain its coverage angles over a wide frequency range with more uniform sound quality.ġ986 EV revolutionizes concert sound reinforcement by introducing Manifold Technology. This product significantly advances the quality of sound on film.ġ970 EV becomes the first company to widely adopt the philosophy of Australian physicists Thiele and Small and use vented low-frequency enclosures. Variable-D improves vocal intelligibility for live sound, recording and broadcast applications.ġ957 EV invents the stereo magnetic phono cartridge.ġ963 EV receives an Academy Award-the first ever for an audio product-from the Academy of Motion Picture Arts and Sciences for the development of the 642 Cardiline shotgun microphone. In the aftermath of World War II, the company is awarded a Congressional Citation for this important contribution to the war effort.ġ954 EV introduces Variable-D microphone technology, a means of minimizing the up-close bass boost inherent in single-D directional microphones. This design element is still used by nearly every company today.ġ940 Electro-Voice introduces the noise-cancelling microphone to the military, which revolutionizes tank and aircraft communications. He calls the system his "Electric Voice."ġ934 EV invents the hum-bucking coil, allowing microphones to be used close to lights and other electrical devices without hum.
Rockne uses the system to address his team during drills on 4 adjacent fields. Some of its "milestones" are:ġ927 The company was founded by Al Kahn and Lou Burroughs in the basement of the Century Tire and Rubber Company in South Bend, Indiana as Radio Engineers.ġ930 Kahn and Burroughs develop a public address system for Knute Rockne, the football coach at Notre Dame University. It is recognized the world over as a leader in audio technology.įrom its humble beginnings, the company has evolved. Over the course of time, EV has grown into one of today's dominant forces in the design and manufacturing of leading-edge products for audio professionals. From the site: : The story of Electro-Voice is a classic American success story.